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1da177e4 LT |
1 | /*************************************************************************** |
2 | * Linux PPP over X - Generic PPP transport layer sockets | |
3 | * Linux PPP over Ethernet (PPPoE) Socket Implementation (RFC 2516) | |
4 | * | |
5 | * This file supplies definitions required by the PPP over Ethernet driver | |
6 | * (pppox.c). All version information wrt this file is located in pppox.c | |
7 | * | |
8 | * License: | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef __LINUX_IF_PPPOX_H | |
17 | #define __LINUX_IF_PPPOX_H | |
18 | ||
19 | ||
20 | #include <asm/types.h> | |
21 | #include <asm/byteorder.h> | |
22 | ||
23 | #ifdef __KERNEL__ | |
24 | #include <linux/if_ether.h> | |
25 | #include <linux/if.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <asm/semaphore.h> | |
28 | #include <linux/ppp_channel.h> | |
29 | #endif /* __KERNEL__ */ | |
30 | ||
31 | /* For user-space programs to pick up these definitions | |
32 | * which they wouldn't get otherwise without defining __KERNEL__ | |
33 | */ | |
34 | #ifndef AF_PPPOX | |
35 | #define AF_PPPOX 24 | |
36 | #define PF_PPPOX AF_PPPOX | |
37 | #endif /* !(AF_PPPOX) */ | |
38 | ||
39 | /************************************************************************ | |
40 | * PPPoE addressing definition | |
41 | */ | |
42 | typedef __u16 sid_t; | |
43 | struct pppoe_addr{ | |
44 | sid_t sid; /* Session identifier */ | |
45 | unsigned char remote[ETH_ALEN]; /* Remote address */ | |
46 | char dev[IFNAMSIZ]; /* Local device to use */ | |
47 | }; | |
48 | ||
49 | /************************************************************************ | |
50 | * Protocols supported by AF_PPPOX | |
51 | */ | |
52 | #define PX_PROTO_OE 0 /* Currently just PPPoE */ | |
53 | #define PX_MAX_PROTO 1 | |
54 | ||
55 | struct sockaddr_pppox { | |
56 | sa_family_t sa_family; /* address family, AF_PPPOX */ | |
57 | unsigned int sa_protocol; /* protocol identifier */ | |
58 | union{ | |
59 | struct pppoe_addr pppoe; | |
60 | }sa_addr; | |
61 | }__attribute__ ((packed)); | |
62 | ||
63 | ||
64 | /********************************************************************* | |
65 | * | |
66 | * ioctl interface for defining forwarding of connections | |
67 | * | |
68 | ********************************************************************/ | |
69 | ||
70 | #define PPPOEIOCSFWD _IOW(0xB1 ,0, size_t) | |
71 | #define PPPOEIOCDFWD _IO(0xB1 ,1) | |
72 | /*#define PPPOEIOCGFWD _IOWR(0xB1,2, size_t)*/ | |
73 | ||
74 | /* Codes to identify message types */ | |
75 | #define PADI_CODE 0x09 | |
76 | #define PADO_CODE 0x07 | |
77 | #define PADR_CODE 0x19 | |
78 | #define PADS_CODE 0x65 | |
79 | #define PADT_CODE 0xa7 | |
80 | struct pppoe_tag { | |
81 | __u16 tag_type; | |
82 | __u16 tag_len; | |
83 | char tag_data[0]; | |
84 | } __attribute ((packed)); | |
85 | ||
86 | /* Tag identifiers */ | |
87 | #define PTT_EOL __constant_htons(0x0000) | |
88 | #define PTT_SRV_NAME __constant_htons(0x0101) | |
89 | #define PTT_AC_NAME __constant_htons(0x0102) | |
90 | #define PTT_HOST_UNIQ __constant_htons(0x0103) | |
91 | #define PTT_AC_COOKIE __constant_htons(0x0104) | |
92 | #define PTT_VENDOR __constant_htons(0x0105) | |
93 | #define PTT_RELAY_SID __constant_htons(0x0110) | |
94 | #define PTT_SRV_ERR __constant_htons(0x0201) | |
95 | #define PTT_SYS_ERR __constant_htons(0x0202) | |
96 | #define PTT_GEN_ERR __constant_htons(0x0203) | |
97 | ||
98 | struct pppoe_hdr { | |
99 | #if defined(__LITTLE_ENDIAN_BITFIELD) | |
100 | __u8 ver : 4; | |
101 | __u8 type : 4; | |
102 | #elif defined(__BIG_ENDIAN_BITFIELD) | |
103 | __u8 type : 4; | |
104 | __u8 ver : 4; | |
105 | #else | |
106 | #error "Please fix <asm/byteorder.h>" | |
107 | #endif | |
108 | __u8 code; | |
109 | __u16 sid; | |
110 | __u16 length; | |
111 | struct pppoe_tag tag[0]; | |
112 | } __attribute__ ((packed)); | |
113 | ||
114 | #ifdef __KERNEL__ | |
115 | struct pppoe_opt { | |
116 | struct net_device *dev; /* device associated with socket*/ | |
117 | struct pppoe_addr pa; /* what this socket is bound to*/ | |
118 | struct sockaddr_pppox relay; /* what socket data will be | |
119 | relayed to (PPPoE relaying) */ | |
120 | }; | |
121 | ||
122 | #include <net/sock.h> | |
123 | ||
124 | struct pppox_sock { | |
125 | /* struct sock must be the first member of pppox_sock */ | |
126 | struct sock sk; | |
127 | struct ppp_channel chan; | |
128 | struct pppox_sock *next; /* for hash table */ | |
129 | union { | |
130 | struct pppoe_opt pppoe; | |
131 | } proto; | |
132 | unsigned short num; | |
133 | }; | |
134 | #define pppoe_dev proto.pppoe.dev | |
135 | #define pppoe_pa proto.pppoe.pa | |
136 | #define pppoe_relay proto.pppoe.relay | |
137 | ||
138 | static inline struct pppox_sock *pppox_sk(struct sock *sk) | |
139 | { | |
140 | return (struct pppox_sock *)sk; | |
141 | } | |
142 | ||
143 | static inline struct sock *sk_pppox(struct pppox_sock *po) | |
144 | { | |
145 | return (struct sock *)po; | |
146 | } | |
147 | ||
148 | struct module; | |
149 | ||
150 | struct pppox_proto { | |
151 | int (*create)(struct socket *sock); | |
152 | int (*ioctl)(struct socket *sock, unsigned int cmd, | |
153 | unsigned long arg); | |
154 | struct module *owner; | |
155 | }; | |
156 | ||
157 | extern int register_pppox_proto(int proto_num, struct pppox_proto *pp); | |
158 | extern void unregister_pppox_proto(int proto_num); | |
159 | extern void pppox_unbind_sock(struct sock *sk);/* delete ppp-channel binding */ | |
160 | extern int pppox_channel_ioctl(struct ppp_channel *pc, unsigned int cmd, | |
161 | unsigned long arg); | |
162 | ||
163 | /* PPPoX socket states */ | |
164 | enum { | |
165 | PPPOX_NONE = 0, /* initial state */ | |
166 | PPPOX_CONNECTED = 1, /* connection established ==TCP_ESTABLISHED */ | |
167 | PPPOX_BOUND = 2, /* bound to ppp device */ | |
168 | PPPOX_RELAY = 4, /* forwarding is enabled */ | |
169 | PPPOX_ZOMBIE = 8, /* dead, but still bound to ppp device */ | |
170 | PPPOX_DEAD = 16 /* dead, useless, please clean me up!*/ | |
171 | }; | |
172 | ||
173 | #endif /* __KERNEL__ */ | |
174 | ||
175 | #endif /* !(__LINUX_IF_PPPOX_H) */ |